Retained Accessory; Power (Rap); Engine Coolant Heater - GMC 2012 Sierra Series Owner's Manual

9-32 Driving and Operating
Pressing the Cruise Control Set
switch a second time.
Pressing the accelerator greater
than a quarter of the down.
Turning the ignition switch to the
LOCK/OFF position.

Retained Accessory

Power (RAP)

The following vehicle accessories
can be used for up to 10 minutes
after the engine is turned off:
Audio System
Power Windows
OnStar System (if equipped)
Sunroof (if equipped)
These features work when the key
is in ON/RUN or ACC/
ACCESSORY. Once the key is
turned from ON/RUN to LOCK/OFF,
the windows and sunroof continue
to work up to 10 minutes until any
door is opened. The radio continues
to work for up to 10 minutes or until
the driver door is opened.

Engine Coolant Heater

The engine heater can provide
easier starting and better fuel
economy during engine warm-up in
cold weather conditions at or
below 18°C (0°F). Vehicles with an
engine heater should be plugged in
at least four hours before starting.
An internal thermostat in the
plug-end of the cord may exist
which will prevent engine coolant
heater operation at temperatures
above 18°C (0°F).
If the vehicle has a diesel engine,
see the Duramax Diesel supplement
for more information.
I n f o r ma t i o n P r o v i d e d b y :
To Use the Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord. The cord is
secured to the Engine
Compartment Fuse Block with a
clip. Carefully remove the wire
tie which bundles the electrical
plug. Do not cut the
electrical cord.
3. Plug the cord into a normal,
grounded 110-volt AC outlet.